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Information Journal Paper

Title

NORMAL CHARACTERISTICS OF ACOUSTIC REFLEX LATENCY

Pages

  25-29

Abstract

 Background: Previous studies have shown that ACOUSTIC REFLEX LATENCY may abnormally increase in some retrocochlear lesions specially brainstem disorders affecting auditory system. Because temporal characteristics of impedance apparatus affect ACOUSTIC REFLEX LATENCY, each laboratory should use normative data for specific equipment in determining ACOUSTIC REFLEX LATENCY. The aim of this study was to determine NORMAL VALUES of ARL in octave frequency 500-2000 Hz and Broad Band Noise (BBN) for the immittance instrument used in Hearing Researches Center of Shahid Beheshti rehabilitation faculty. Ear effect and stimulus parameters on ARL were further studied.Materials and Methods: This descriptive analytic research was conducted on 28 normal hearing persons with age ranging from 18 to 45 (mean=27 years and SD=5.9 years). Contralateral and ipsilateral acoustic reflex thresholds (ART) were obtained by tonal stimuli 500-2000 Hz and BBN (only in contralateral stimulation). ARL was defined as the time interval between onset of the stimulus and the first detectable compliance change and determined in ART+10 dB intensity level.Results: The results of present study shows that ARL depends on frequency and intensity of acoustic reflex eliciting stimulus and increases with increasing frequency and decreases with intensity increases.There is no statistically significant difference between right and left ear ARLs in each ipsilateral and contralateral stimulation.Conclusion: ARL characteristics depend on the eliciting stimulus parameters such as frequency and intensity and are more stable in lower frequencies than higher frequencies. It is recommended that the NORMAL VALUES of ARL are determined in children and aged persons.

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  • Cite

    APA: Copy

    PEYVANDI, A.A., & MAHDAVI, M.E.. (2005). NORMAL CHARACTERISTICS OF ACOUSTIC REFLEX LATENCY. RESEARCHER BULLETIN OF MEDICAL SCIENCES (PEJOUHANDEH), 10(1 (43)), 25-29. SID. https://sid.ir/paper/18314/en

    Vancouver: Copy

    PEYVANDI A.A., MAHDAVI M.E.. NORMAL CHARACTERISTICS OF ACOUSTIC REFLEX LATENCY. RESEARCHER BULLETIN OF MEDICAL SCIENCES (PEJOUHANDEH)[Internet]. 2005;10(1 (43)):25-29. Available from: https://sid.ir/paper/18314/en

    IEEE: Copy

    A.A. PEYVANDI, and M.E. MAHDAVI, “NORMAL CHARACTERISTICS OF ACOUSTIC REFLEX LATENCY,” RESEARCHER BULLETIN OF MEDICAL SCIENCES (PEJOUHANDEH), vol. 10, no. 1 (43), pp. 25–29, 2005, [Online]. Available: https://sid.ir/paper/18314/en

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